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QUESTION

If the diameter of a circle is 12 inches, what is the area, circumference and the radius?

R.= 6, C. ~~ 38 and A. ~~ 113.

First you need to find the radius, the key term to find the radius is diameter = 2*radius; therefore the radius r is 12/2 = 6 inches.

To find the area of a circle, you need to use the formula A = pi*r^2; therefore the area A is pi*6^2 ~~ 113 square inches.

To find the circumference of a circle, you will use the formula C = 2*pi*r; therefore the circumference C is 2*pi*6 ~~ 38 inches.